EP0005024A1 - Matériaux sous forme de feuille - Google Patents

Matériaux sous forme de feuille Download PDF

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Publication number
EP0005024A1
EP0005024A1 EP79300587A EP79300587A EP0005024A1 EP 0005024 A1 EP0005024 A1 EP 0005024A1 EP 79300587 A EP79300587 A EP 79300587A EP 79300587 A EP79300587 A EP 79300587A EP 0005024 A1 EP0005024 A1 EP 0005024A1
Authority
EP
European Patent Office
Prior art keywords
stilt
microcapsules
agglomerates
mineral particles
sheet material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP79300587A
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German (de)
English (en)
Inventor
Hugh Kirby Myers
Donald Edward Hayford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Appvion Operations Inc
Original Assignee
Appleton Papers Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Appleton Papers Inc filed Critical Appleton Papers Inc
Publication of EP0005024A1 publication Critical patent/EP0005024A1/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/1243—Inert particulate additives, e.g. protective stilt materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/914—Transfer or decalcomania
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y10T428/24975—No layer or component greater than 5 mils thick
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254—Polymeric or resinous material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/259—Silicic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2984—Microcapsule with fluid core [includes liposome]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2984—Microcapsule with fluid core [includes liposome]
    • Y10T428/2985—Solid-walled microcapsule from synthetic polymer
    • Y10T428/2987—Addition polymer from unsaturated monomers only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2998—Coated including synthetic resin or polymer

Definitions

  • This invention relates to so-called stilt materials for preventing premature rupture of microcapsules coated on to sheet material, particularly, but not exclusively, microcapsule-coated sheet material forming part of a pressure-sensitive copying system.
  • an upper sheet is coated on its lower surface with microcapsules containing a solution of at least one colourless colour former
  • a lower sheet is coated on its upper surface with a colour-developing co-reactant material, e.g. an acidic clay, a phenolic resin, or certain salts of organic acids.
  • a number of intermediate sheets is also provided, each of which is coated on its lower surface with microcapsules and on its upper surface with colour developing material.
  • the sheets of the system are normally of paper, but other materials may be used. Pressure exerted on the sheets by writing or typing ruptures the microcapsules, thereby releasing the colour former solution on to the acidic material on the next lower sheet and giving rise to a chemical reaction which develops the colour of the colour former to produce a copy print.
  • microcapsules and colour developing coreactant material are coated on to the same surface of a sheet, again usually of paper, and writing or typing on a sheet placed above the coated sheet causes the capsules to rupture and release the colour former, which then reacts with the colour developing material on the sheet to produce a copy print.
  • the sheet is thus supported on a surface with which it is in contact primarily by means of the inert particles, which thus bear the brunt of any pressures acting accidentally or unavoidably on the sheet during handling or storage, and so minimise premature capsule rupture.
  • the role of the inert particles in supporting the sheet has led to those particles being termed “stilt materials”, and this terminology is adopted in this specification.
  • the stilt materials most widely used hitherto have been cellulose fibre flocs and granular (i.e. uncooked) starches, although various other particulate materials have been proposed.
  • stilt materials do not prevent or substantially impede capsule rupture under the influence of writing or typing pressure.
  • the present invention provides in a first aspect, sheet material carrying a coating of pressure-rupturable microcapsules interspersed by a stilt material in close juxtaposition with the microcapsules and serving to protect the microcapsules against accidental rupture, characterised in that the stilt material comprises agglomerates in which mineral particles are dispersed in a matrix of coacervated polymer.
  • the sheet material may be paper, or it may be a film, and may be a pressure-sensitive copying sheet (of the transfer or self-contained type) in which case the microcapsules contain a solution of at least one colourless colour former.
  • the microcapsules may however contain other materials, such as the numerous materials which it has been previously proposed to encapsulate in the patent other literature.
  • the invention provides a method of producing a stilt material for protecting microcapsules coated on to sheet material against accidental rupture, characterised in that a suspension is established of mineral particles in an aqueous solution of coacervatable polymer, and in that the polymer is caused to coacervate and deposit about the suspended mineral particles to produce agglomerates in which mineral particles are dispersed in a matrix of coacervated polymer.
  • the invention provides a stilt material for protecting microcapsules coated on to sheet material against accidental rupture, characterised in that the stilt material comprises agglomerates in which mineral particles are dispersed in a matrix of coacervated polymer.
  • the mineral particles are preferably of kaolin, and preferably have an average size of about 1 to 2 microns.
  • the coacervate is preferably a complex coacervate of at least two polymers, one of which is preferably gelatin and another of which is preferably gum arabic.
  • Carboxymethyl cellulose, sodium alginate, agar-agar and dextran sulphate are examples of alternatives to gum arabic.
  • the coacervation techniques used may be those described in U.S. Patents 2 800 457 and Re. 24, 899.
  • the weight of stilt material in the coating is preferably from about 1/5 or 1/4 to 1/3 of the weight of microcapsules in the coating,
  • the average diameter of the stilt material agglomerates is preferably from 2 to 12 times that of the nicrocapsules.
  • the average diameter of the stilt material agglomerates is from about 20 to about 35 microns, and the average diameter of the microcapsules is from about 3 to about 12 microns, usually from 4 to 9 microns.
  • the suspension of mineral particles and dissolved polymer(s) may be subjected to ion exchange resin treatment before coacervation occurs. This permits a higher ratio of mineral to polymer to be used in making the agglomerates.
  • ion exchange resin is the ion exchange resin beads supplied as Ionac M-614 Mixed Ion Exchanger by Ionac Chemical Co. of Birmingham, New Jersey, U.S.A.
  • Ionac M-614 Mixed Ion Exchanger is a chemically equivalent mixture of Ionac C-267 strong acid cation exchange resin, polystyrene/divinylbenzene polymeric spherical beads and Ionac A-542 strong base, Type I anion exchange resin, polystyrene base, spherical beads (in OH-form). Both resins are furnished in the -16 +50 mesh size range.
  • NM-60 Mixed Ion Exchanger supplied by the same company, is an. alternative to Ionac M-614 Mixed Ion Exchanger.
  • the present stilt material agglomerates have a smooth surface and are non-absorbent with respect to oily colour former solutions. They thus facilitate transfer of such a solution from a ruptured capsule to a colour developing surface on a lower sheet.
  • the size of the agglomerates relative to the microcapsules being used may be chosen so as to achieve an optimum protective effect.
  • the agglomerates may be over coated if desired with a harder polymeric material.
  • agglomerates The precise structure of the agglomerates has not been established, and in particular it is not known whether there is a substantially mineral-free shell of coacervated polymer about the mineral particles (in the manner of a microcapsule shell) or whether the mineral particles are distributed throughout the stilt material agglomerate.
  • microcapsules may be made, for example, by coacervation techniques such as disclosed in U.S. Patents 2 800 457 and Re. 24,899, or by in situ polymerisation techniques such as described in U.S. Patents 3 755 190 and 4 001 140, or by interfacial polymerisation or other known techniques.
  • the colour formers which may be present in the microcapsules include Crystal Violet Lactone, as disclosed for example in U.S. Patent Re. 23024 or others known in the pressure-sensitive copying art.
  • U.S. Patents 3 525 630, 3 540 909, 3 540 911, 3 558 341, 3 723 141, 3 746 562, 3 940 275 and 4 027 065 disclose numerous such colour formers.
  • a sheet 23 of paper carries a coating containing microcapsules 20 and larger stilt material agglomerates 21.
  • the microcapsules and the stilt material agglomerates are randomly interspersed and are in close juxtaposition.
  • the size of the microcapsules 20 relative to the thickness of the paper sheet 23 has been exaggerated for the sake of clarity. In practice, the thickness of a paper sheet is usually many times greater than the average diameter of the microcapsules.
  • a stilt material agglomerate 21 comprises mineral particles 22 dispersed in a matrix 25 of coacervated polymer.
  • the stilt material agglomerates are thought to exert their protective action by overhanging the smaller microcapsules and by bridging accidentally applied pressures.
  • This Example illustrates the preparation of encapsulated kaolin stilt material particles.
  • This Example illustrates the benefits of using an ionexchange resin in the preparation of encapsulated kaolin stilt material particles.
  • 132 g of a 68% w/w aqueous slurry of kaolin clay was diluted with 378 g of distilled water.
  • 90 g of a 10% solution of 150 Bloom pigskin gelatin and 90 g of a 10% solution of gum arabic were added to the thus-diluted slurry.
  • the mixture was stirred in a bath maintained at 55°C until it reached the temperature of the bath.
  • 75 g of ion exchange resin beads (Ionac M-614 Mixed Ion Exchanger) were then added, and the mixture was stirred for 40 minutes, after which the resin beads were removed by filtering out with cheesecloth.
  • the pH of the filtrate slurry was raised from 4.0 to 4.5 by addition of 3 drops of a 20% NaOH solution. It was then stirred in an ice bath, and 2.25 ml. of a 50% solution of glutaraldehyde were added. Kaolin/ coacervate agglomerates having an average diameter of about 32 microns resulted. be noted that the ratio of kaolin to gelatin in the starting materials was approximately 10 to 1.
  • the use of an ion exchange resin enables a higher ratio of kaolin to gelatin to be used than is possible in the absence of such a resin, as will now be illustrated by the following comparative procedure which is substantially the same as described earlier in this Example except that no ion exchange resin was employed.
  • the comparative procedure was as follows:-132 g of a 68% w/w aqueous slurry of kaolin clay was diluted with 378 g of distilled water. 90 g of a 10% solution of 150 Bloom pigskin gelatin and 90 g of a 10% solution of gum arabic were added to the thus-diluted slurry. The pH of the resulting mixture was 4.75, and was lowered to 4.5 with 3 drops of 10% H 2 S0 4 solution.
  • the mixture was transferred to an ice bath with continuous stirring. 2.25 ml of a 50% solution of glutaraldehyde were added when the temperature reached 10°C. The mixture was removed from the ice bath, and stirred overnight as it warmed to room temperature.
  • the kaolin was found to be mostly unaggbmeratad, except for a few irregular chunks in the 100 micron diameter range, i.e. satisfactory stilt material was not obtained.
  • This Example illustrates the use of stilt material particles prepared as described in Examples I and II with a capsule-containing coating composition in the manufacture of a pressure-sensitive copying paper.
  • a suspension of microcapsules each containing a solution of a mixture of colourless colour formers was first prepared by the following procedure (in which the parts referred to are by weight):-
  • the mixture was then heated to 55°C and held at that temperature for 6 hours. Heating was then discontinued. The pH of the mixture was adjusted to 7.5 with a 28% aqueous ammonium hydroxide solution 24 hours after heating had been discontinued. A suspension of microcapsules was found to have been produced. The entire procedure was then repeated twice to produce two further batches of microcapsule suspension.
  • Coating compositions for producing pressure-sensitive copying sheets were then prepared by mixing the kaolin agglomerates prepared as described in Examples I and II above with respective batches of microcapsules prepared as just described and with an oxidised corn starch binder (Stayco S manufactured by A.E. Staley Co. of Illinois, U.S.A.) and sufficient water to produce a 17% solids content composition. Neither the kaolin agglomerates nor the microcapsules were separated from the suspensions in which they had been produced before the mixing took place. The constituents of each resulting composition on a dry basis were as follows:-
  • compositions were each coated on to 34 lb/3300 ft 2 base paper stock using a wire wound coating rod, and the thus applied coating was dried.
  • the coatweight was 2.6 lbs/3300 ft 2 in the case of the composition containing the Example I kaolin agglomerates and 2.5 lbs/3300 ft 2 in the case of the composition containing the Example II kaolin agglomerates.
  • a further coating composition was then made up using the remaining batch of microcapsules containing colour former solution, prepared as described above, but using uncooked wheatstarch * particles as a stilt material (as disclosed in British Patent 1 252 858) rather than the kaolin agglomerates referred to above.
  • the solids content of the coating composition was adjusted to be 17%, and on a dry basis, its composition was as follows:-
  • composition was coated on to the same base paper stock as described above, and the dry coatweight was 2.5 lbs/3300 ft 2 .
  • the microcapsule-coated papers produced as described above were each superimposed on an underlying colour developing sheet to produce pressure-sensitive copying sets.
  • the colour developing sheets carried a coating of an oil-soluble metal salt of a phenol-formaldehyde novolak resin which had been made by procedures described in U.S. Patents 3 732 120 and 3 455 721.
  • Four different tests were performed on the thus-produced copying sets. Two of these tests, namely the typewriter intensity (TI) test and the calender intensity (CI) test, measured the response of the copying sets to deliberate marking pressures.
  • the remaining two tests namely the frictional smudge (FS) test and the static smudge (SS) test measured the response of the copying sets to accidental or casual i marking pressures.
  • the TI test was essentially an impact pressure test. A standard pattern was typed on the top sheet of each set. The reflectance of the area of the lower sheet which carried the resulting copy was a measure of the extent of colour development on the lower sheet and was recorded as the ratio of the reflectance of the area carrying the copy to that of an area of the sheet not carrying a copy (I/I o ) and was expressed as a percentage.
  • the CI test was essentially a rolling pressure test (as opposed to an impact pressure test) and was conducted to determine the amount of colour developed from the transfer of colour former solution caused by such rolling pressure. Again, the results were reported as the ratio of the reflectance of the copy produced on the lower sheet as compared to the reflectance of an area of the paper not carrying a copy (I/I o ), and were also expressed as a percentage. In both the TI and CI test results the lower the value, the more intense the mark and the better the system as to copy image visibility.
  • a value of 100 represents no colouration at all and the lower the value the less are the microcapsules protected against rupture under accidental or casual pressures.
  • a value of about 80 or greater is usually acceptable for FS and a value of about 88 or greater is usually acceptable for SS.

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  • Color Printing (AREA)
  • Medicinal Preparation (AREA)
EP79300587A 1978-04-25 1979-04-10 Matériaux sous forme de feuille Ceased EP0005024A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/899,847 US4211437A (en) 1978-04-25 1978-04-25 Stilt capsules for pressure-sensitive record material
US899847 1986-08-25

Publications (1)

Publication Number Publication Date
EP0005024A1 true EP0005024A1 (fr) 1979-10-31

Family

ID=25411642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79300587A Ceased EP0005024A1 (fr) 1978-04-25 1979-04-10 Matériaux sous forme de feuille

Country Status (6)

Country Link
US (1) US4211437A (fr)
EP (1) EP0005024A1 (fr)
JP (1) JPS54143325A (fr)
AU (1) AU529298B2 (fr)
CA (1) CA1129261A (fr)
ES (1) ES479862A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556284A1 (fr) * 1983-12-08 1985-06-14 Drescher Datendrucke Support autocopiant
EP0509300A1 (fr) * 1991-04-19 1992-10-21 Süd-Chemie Ag Couche protective pour matériaux d'enregistrement sensibles à la pression et matériaux d'enregistrement préparés utilisant cette couche
WO2014076468A1 (fr) * 2012-11-14 2014-05-22 Active Device Development Limited Matériaux de formation de couleur, dispositifs d'enregistrement de contact et dispositifs d'enregistrement de pression

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037477B1 (fr) * 1980-03-26 1984-08-22 Bayer Ag Système copiant et procédé pour sa préparation, ainsi qu'encre pour impression planographique resp. encre typographique
US4481252A (en) * 1981-12-10 1984-11-06 Ciba-Geigy Ag Sheet material
JPS59138487A (ja) * 1983-01-28 1984-08-08 Mitsubishi Paper Mills Ltd 感圧複写紙用保護材
US4675269A (en) * 1984-11-13 1987-06-23 The Mead Corporation Free particle abrasion development of imaging sheets employing photosensitive microcapsules
US4578340A (en) * 1984-11-13 1986-03-25 The Mead Corporation Free particle abrasion development of imaging sheets employing photosensitive microcapsules
US4622282A (en) * 1985-02-20 1986-11-11 The Mead Corporation Photographic method for forming images on plain paper
US4847110A (en) * 1986-09-10 1989-07-11 Canon Kabushiki Kaisha Transfer recording medium and process for production thereof
US4956309A (en) * 1988-12-06 1990-09-11 The Mead Corporation Microroughened developer sheet for forming high density images
US5002924A (en) * 1989-10-05 1991-03-26 The Standard Register Company Carbonless copy paper coating containing microencapsulated load bearers
DE69323875T2 (de) * 1992-12-14 1999-09-30 Sony Corp., Tokio/Tokyo Fixierzusammensetzung für tinte auf wasserbasis, mit dieser versehene abdeckfolie für thermisch zu übertragende bilder und dafür bestimmtes aufzeichnungsmedium
US7485609B2 (en) * 2005-09-29 2009-02-03 Kimberly-Clark Worldwide, Inc. Encapsulated liquid cleanser

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US2655453A (en) * 1952-04-23 1953-10-13 Ncr Co Manifold sheet having a crushresistant transfer film
US3481759A (en) * 1966-08-22 1969-12-02 Minnesota Mining & Mfg Impact marking carbonless paper
US3743604A (en) * 1969-01-09 1973-07-03 Bayer Ag Process for the production of microcapsules
FR2170687A5 (fr) * 1972-01-31 1973-09-14 Wiggins Teape Res Dev
US3839064A (en) * 1972-09-21 1974-10-01 Champion Int Corp Inorganic pigment-loaded polymeric microcapsular system
US3844816A (en) * 1971-05-12 1974-10-29 Plywood Champion Papers Inc Grafted, polymeric microcapsular system
US3930101A (en) * 1972-09-21 1975-12-30 Champion Int Corp Inorganic pigment-loaded polymeric microcapsular system
US4046404A (en) * 1976-11-26 1977-09-06 Xerox Corporation Carbonless paper for use in electrostatographic copiers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL128441C (fr) * 1960-03-10 1900-01-01
US3617334A (en) * 1968-11-08 1971-11-02 Ncr Co Pressure-sensitive sheet material
US3697323A (en) * 1971-01-06 1972-10-10 Ncr Co Pressure-sensitive record material
US3996405A (en) * 1973-01-24 1976-12-07 Ncr Corporation Pressure-sensitive record material
GB1476787A (en) * 1974-07-04 1977-06-16 Wiggins Teape Ltd Coated sheet material

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655453A (en) * 1952-04-23 1953-10-13 Ncr Co Manifold sheet having a crushresistant transfer film
US3481759A (en) * 1966-08-22 1969-12-02 Minnesota Mining & Mfg Impact marking carbonless paper
US3743604A (en) * 1969-01-09 1973-07-03 Bayer Ag Process for the production of microcapsules
US3844816A (en) * 1971-05-12 1974-10-29 Plywood Champion Papers Inc Grafted, polymeric microcapsular system
FR2170687A5 (fr) * 1972-01-31 1973-09-14 Wiggins Teape Res Dev
US3839064A (en) * 1972-09-21 1974-10-01 Champion Int Corp Inorganic pigment-loaded polymeric microcapsular system
US3930101A (en) * 1972-09-21 1975-12-30 Champion Int Corp Inorganic pigment-loaded polymeric microcapsular system
US4046404A (en) * 1976-11-26 1977-09-06 Xerox Corporation Carbonless paper for use in electrostatographic copiers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556284A1 (fr) * 1983-12-08 1985-06-14 Drescher Datendrucke Support autocopiant
EP0509300A1 (fr) * 1991-04-19 1992-10-21 Süd-Chemie Ag Couche protective pour matériaux d'enregistrement sensibles à la pression et matériaux d'enregistrement préparés utilisant cette couche
WO2014076468A1 (fr) * 2012-11-14 2014-05-22 Active Device Development Limited Matériaux de formation de couleur, dispositifs d'enregistrement de contact et dispositifs d'enregistrement de pression
US9604485B2 (en) 2012-11-14 2017-03-28 Active Device Development Limited Colour-forming materials, contact recording devices and pressure recording devices

Also Published As

Publication number Publication date
AU529298B2 (en) 1983-06-02
JPS54143325A (en) 1979-11-08
CA1129261A (fr) 1982-08-10
ES479862A1 (es) 1980-02-01
AU4642579A (en) 1979-11-01
US4211437A (en) 1980-07-08

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